2025 GMC Sierra HD
2025 GMC Sierra HD in FLAGSTAFF, AZ
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2025 GMC Sierra HD In Flagstaff, AZ
The 2025 GMC Sierra HD is a heavy-duty pickup that combines exceptional power with premium features. Built for demanding tasks yet offering a refined driving experience, the Sierra HD is available in both 2500HD and 3500HD models. With multiple trims, this truck suits a range of work and lifestyle needs, allowing drivers to find the right fit.
Trim Levels
The 2025 GMC Sierra HD comes in various trims, each offering unique exterior features. The Pro trim provides a solid base with signature GMC C-shaped LED lighting and practical cargo bedside steps. The SLE trim adds style with chrome accents and optional roof marker lamps. The SLT trim upgrades with larger wheels, from 18-inch to 22-inch, and a refined grille.
For off-road capability, the AT4 trim includes rugged features such as trailer tow mirrors and body-color accents, while the AT4X adds power-retractable assist steps and higher ground clearance. The Denali trim brings luxury with chrome details and a distinctive grille, and the Denali Ultimate offers top-tier sophistication with exclusive power-retractable assist steps and a unique grille.
For off-road capability, the AT4 trim includes rugged features such as trailer tow mirrors and body-color accents, while the AT4X adds power-retractable assist steps and higher ground clearance. The Denali trim brings luxury with chrome details and a distinctive grille, and the Denali Ultimate offers top-tier sophistication with exclusive power-retractable assist steps and a unique grille.
Engine
The 2025 GMC Sierra HD offers two powerful engines. The 6.6-liter V-8 gas engine delivers 401 horsepower and 464 pound-feet of torque, providing robust power for most tasks. For even greater strength, the 6.6-liter Duramax Turbo-Diesel V-8 produces 470 horsepower and an impressive 975 pound-feet of torque. Both engines are paired with a 10-speed Allison automatic transmission for smooth and efficient power delivery in any driving condition.
Performance
The 2025 GMC Sierra HD delivers outstanding performance. With a maximum towing capacity of up to 36,000 pounds in the 3500HD diesel configuration, it's built to haul the heaviest loads. It also supports a max payload of up to 7,290 pounds, ideal for demanding jobs. Available four-wheel drive with Auto 4WD mode and an independent front suspension enhance handling and stability. The AT4X trim caters to off-road enthusiasts, featuring an off-road suspension with DSSV dampers, front and rear e-locking differentials, and 35-inch MT tires for improved traction and control on rugged terrain.
Interior
The 2025 GMC Sierra HD interior combines comfort and convenience with space for up to six passengers in the Crew Cab configuration. High-quality materials are used throughout, with options for leather-appointed seating in a roomy cabin. A 13.4-inch infotainment touchscreen pairs with a 12.3-inch digital driver information center, and an available 15-inch head-up display enhances the experience.
Connectivity features include wireless Apple CarPlay and Android Auto, plus an available Wi-Fi hotspot. Higher trims provide a Bose premium audio system, keyless open and start, and dual-zone automatic climate control. Additional options include heated and ventilated front seats, heated rear outboard seats, and wireless phone charging.
Connectivity features include wireless Apple CarPlay and Android Auto, plus an available Wi-Fi hotspot. Higher trims provide a Bose premium audio system, keyless open and start, and dual-zone automatic climate control. Additional options include heated and ventilated front seats, heated rear outboard seats, and wireless phone charging.
Safety Features
The 2025 GMC Sierra HD is equipped with a comprehensive safety suite. The GMC Pro Safety suite includes forward collision alert, automatic emergency braking, front pedestrian braking, and lane-keep assist with lane departure warning. IntelliBeam auto high beams adjust for varying conditions.
The enhanced Pro Safety Plus package, available on higher trims, adds rear cross-traffic braking, reverse automatic braking, and adaptive cruise control. The high-definition surround-vision camera offers a 360-degree view, while trailer-side blind-zone alert aids in safe towing. Additional features include hill-start assist, hill-descent control, Stabilitrak electronic stability control, a tire-pressure monitoring system, Teen Driver mode, and OnStar and GMC Connected Services for enhanced safety and connectivity.
The enhanced Pro Safety Plus package, available on higher trims, adds rear cross-traffic braking, reverse automatic braking, and adaptive cruise control. The high-definition surround-vision camera offers a 360-degree view, while trailer-side blind-zone alert aids in safe towing. Additional features include hill-start assist, hill-descent control, Stabilitrak electronic stability control, a tire-pressure monitoring system, Teen Driver mode, and OnStar and GMC Connected Services for enhanced safety and connectivity.
*Internet pricing includes all available manufacturer rebates and pre-owned discounts. Some vehicles may include a manufacturers rebate requiring the financing through the manufacturer's captive lender. The Internet price includes a $1500 finance bonus cash that is only available when financed through an Oxendale Auto Group 640+ prime financing. Some lender restrictions may apply. All pricing is plus tax, title, license and $599 doc fee. The offer is valid only on vehicles in stock at the time of purchase and expires at the close of business today. Second key, floor mats, and owner’s manual may not be available on all pre-owned vehicles. Quoted price is subject to change daily based on the current market. Oxshield offered (Window Tint, Ceramic coating, Door Edge Guards and Door Cups) for $1999.99. Not responsible for typos.
* In transit means that vehicles have been built, but have not yet arrived at your dealer. Images shown may not necessarily represent identical vehicles in transit to your dealership. See your dealer for actual price, payments and complete details.
Select vehicles may have a market area adjustment based on availability. Please see dealer for details.
The Manufacturer's Suggested Retail Price excludes tax, title, license, dealer fees and optional equipment. Dealer sets final price.